fn main() {
    let (n, k): (usize, usize) = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        let mut iter = buf.split_whitespace();
        (
            iter.next().unwrap().parse().unwrap(),
            iter.next().unwrap().parse().unwrap(),
        )
    };

    let a: Vec<usize> = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        let iter = buf.split_whitespace();
        iter.map(|x| x.parse().unwrap()).collect()
    };

    let mut dp = vec![0; 1 << n];
    dp[0] = k;
    for s in 0..(1 << n) {
        for i in 0..n {
            if (s & (1 << i)) != 0 { continue; }
            dp[s | (1 << i)] = {
                std::cmp::max(
                    dp[s | (1 << i)],
                    dp[s] % a[i],
                )
            }
        }
    }
    
    let ans = dp[(1 << n) - 1];
    println!("{}", ans);
}